They reap every one his corn - Margin, “mingled corn,” or “dredge.” The word used here (בליל belı̂yl) denotes, properly, “meslin,” mixed provender, made up of various kinds of grain, as of barley, vetches, etc., prepared for cattle; see the notes at Isaiah 30:24.
In the field - They break in upon the fields of others, and rob them of their grain, instead of cultivating the earth themselves. So it is rendered by Jerome - Agrum non suum deme-runt; et vineam ejus, quem vi. oppresserint vindemiant. The Septuagint renders it, “A field, not their own, they reap down before the time - πρὸ ὥρας pro hōras.
They gather the vintage of the wicked - Margin, “the wicked gather the vintage.” Rather, they gather the vintage of the oppressor. It is not the vintage of honest industry; not a harvest which is the result of their own labor, but of plunder. They live by depredations on others. This is descriptive of those who support themselves by robbery.